A covalent bond is one in which the electron is (more or less) equally shared between atoms. An Ionic bond is where one atom has a greater attraction for the electron than the other. Ionic bonds are formed between those elements that are at opposite end of the Periodic Table: the further away from each other the two elements are the more ionic will be their bond, the closer together the more covalent will be their bond. The most covalent bonds are between atoms of the same element O2 Cl2 N2 ..... The most Ionic of bond are between the alkali metals (H, Li, Na, K, Rb, Cs, Fr) and the Halogens (F, Cl, Br, I, At). Of these Ionic character is also affected by the top and bottom extremes of the table so the most ionic bond possible would be FrF, although Francium is extremely extremely rare so the most ionic compound known is Cesium Fluoride.
It is not necessary. The type of bonding you mentioned is called ionic bonding in which one atom looses electrons and other atom of any other element gains it.
But another type of chemical bond is also formed called as Covalent bond in which atoms of same or different element share electrons. For example:- Cl2, CH4 etc. are formed by covalent bonding
When an atom donates/receives an electron to form a compound, the particles of that compound have ionic bonding. This occurs between metals and non-metals.
The other bonding, covalent, occurs when atoms shareelectrons and bonds non-metals with non-metals.
ionic bond
Chemistry is still very theortical, but, the actions of the electrons have actually been observed under observation with the electron microscope. The electrons are the "binding" forces when two atoms meet. The combination of atoms and molecules are the "stock and trade" of chemical reactions. It is an amazing thing to see. When you do lab experiments, you see....results. How it happens is 'theory', though you know it will happen every time. When you see the thing happen under the electron microsope,...you are more than a theorist.... you are a "believer".
The elements involved give and take electrons in an ionic bond. The bond is created because of the electrostatic attraction between the 2 charges.
As you can see from the periodic table, mostly, metallic atoms lose electrons such as Sodium, Magnesium, Iron, Calcium etc. These are all atoms that have four or less electrons in their last/outer shellHowever, this is only in an ionic bond where electrons are taken or given but not in covalent bonds. Covalent bonds involve the sharing of electrons rather than giving/taking
You an have several chemical bonds, intermolecular ( between molecules) and intramolecular ( within molecules) bonds. The main INTRAmolecular chemical bonds are Ionic - the taking/giving of electrons between atoms gives them a charge, they are therefor electomagnetically attracted to each other, this only occurs between metals. Covalent bonds- atoms share electrons, occurs between nonmetals, this would also be an electromagnetic force, the atoms electron clouds are sort of entwined. Metallic bonding- sorry I don't know alot about it. Then you have your main intermolecular bonding which can be divided into polar and non polar molecular. For intermolecular bonds like attracts like.
A physical reaction is when no new substances are formed, there is a change of state eg ice melting to a liquid. A chemical change is when the reaction forms a new substance. eg gas bubbles. An acid reaction can be both. You need to look at the reaction taking place, look for change of state (physical) or any colour change or gas bubbles (chemical).
Giving is to taking is as living is to existing!
ions are formed based upon the valence electrons of the element and if the element is a metal or a nonmetal. S has 6 valence electrons and needs 2 more to be stable. it is a nonmetal. therefore, taking on 2 electrons gives S a -2 charge
the valence shell is the outermost shell of an atom that has free electrons for taking part in chemical reactions... the valence shell of sodium has one free electron
taking.
taking.
Taking is the opposite of giving
are the substances formed by a chemical reaction. In the burning of natural gas, carbon dioxide (CO2) and water (H2O) are the products formed by the reaction. Reactants and products can be elements or compounds, depending on the reaction taking place.
During a chemical change the structure of molecules (as chemical composition) is changed. Signs of chemical reactions may be: - Gas release - Formation of a precipitate - Change of color - Change of odor - Change of pH - Change of aspect - Change of viscosity - Change of the temperature - Visible formation of new compounds
When you say that there is moisture in the air it pretty much means water in the air.It is a physical change, as no new products have been formed.
There would be no volcanoes and no crystals or diamonds and gold because they are formed because of the chemical reactions taking place inside the earth and because of the heat.
an insoluble sold formed in a chemical reaction that is taking place on a solution. Observed when the amount (concentration) of that substance is greater than its solubility. small crystals settel out in the container.
A chemical change is taking place.